Parks Canada has reported promising developments in the recovery of the threatened westslope cutthroat trout in Banff National Park. After more than a decade of conservation efforts, these fish are now spawning naturally in Hidden Lake, near Lake Louise, indicating a self-sustaining population. Aquatics specialist Shelley Humphries noted that previous attempts to eliminate non-native brook trout were unsuccessful until the use of rotenone, a natural fish poison, in 2018 and 2019. Since then, westslope cutthroat trout eggs have been introduced, leading to successful spawning and the emergence of fully grown fish this year. Parks Canada aims to monitor their population and hopes to see them expand into surrounding streams and creeks for further recovery.
Why It Matters
The westslope cutthroat trout once occupied a vast range across Banff National Park and surrounding areas, but their habitat has been significantly reduced due to the introduction of non-native fish species and recreational fishing. Currently, they are found in only about 10% of their historical waterways. Parks Canada’s ongoing restoration efforts not only aim to revive this species but also support the broader ecosystem, benefiting other wildlife such as birds of prey and bears. The agency’s work aligns with historical conservation practices in North America, where similar strategies have successfully rehabilitated at-risk fish populations.
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